What are you talking about Dol-fan? I am a season ticket holder and I have much experience on this topic. Heath Evans by far topped the cake in terms of boos. I can't remember how many times he'd come into a game, miss a block, get Hass decked, and then drop a pass. Fans didn't like him at all. DJack drops a lot of passes and has led to some boos, but they are never directed solely at him, but the offense in general for not being able to sustain a drive. Evans on the other hand was a one man wrecking crew in that regard. He was viewed by fans as Shaun Alexander's lap dog as he followed Shaun everywhere. It was even a running joke that Heath had compromising pictures of Holmgren and that's how he was keeping he place on the team.
In all seriousness though, the reason for both Evans and Richard being on the team the past few years had nothing to do with their play (or lack there of), but moreso that they were terrible picks by Holmgren himself back when he was GM. Both were 3rd round picks if I'm not mistaken and both ended up being horrible selections by Holmgren in retrospect. Mike has proven to be a bit stubborn in giving up on guys he chose (ie - Koren Robinson). Once you give up on a guy, it's an admission that you made a mistake, which can be hard to do. This trade with Richard was pretty savvy on Ruskell's part for the Hawks IMO. There are a couple of young guys that were pushing Richard down the depth charts and possibly off the team. Had they released him he would've still counted againt the cap. But now the $750,000 or so he was slotted is freed up. Those are the kinda things that help out big time in today's salary cap NFL.